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The County of DuPage
Wheaton, Illinois

Freedom of Information Act: Supervisor of Assessments Statement of Policy

Record Requests

Freedom of Information Act (FOIA) requests are to be made to the department contact listed below or the County FOIA Officer. Requesting documents directly from Department Contact will expedite the response to requests. Records requests under the FOIA shall be in writing or transmitted electronically to the specified FOIA e-mail address. Pursuant to 5 ILCS 140/3.1, the requestor must state whether the requested documents will be used for a commercial purpose as defined in 5 ILCS 20/2(c-5). The requestor will be notified as soon as the documents are available for inspection and/or copying.

FOIA Org Chart SOA

Department FOIA Requests Contact Information

Email Supervisor of Assessments FOIA Requests
Supervisor of Assessments
FOIA Request
Jack T. Knuepfer Admin Bldg
421 N. County Farm Road
Wheaton, IL 60187

Alternate Mailing Address
DuPage County FOIA Officer
Jack T. Knuepfer Admin Bldg
421 N. County Farm Road
Wheaton, IL 60187

Primary Records Maintained by Supervisor or Assessments Office:

  • Agricultural Productivity Index Calculation Worksheets
  • Certificates of Error
  • Certificates of Error Publication Source Data  
  • Certificates of Publication
  • Change of Assessment Notice Source Data 
  • Conservation Stewardship Plan File
  • Disabled Persons' Homestead Exemption File
  • Disabled Veterans' (Adaptive Housing) Exemption File
  • Disabled Veterans' (Standard) Homestead Exemption File
  • Final Abstract of Assessments (PTAX-204, '260A) 
  • Historic Residence Assessment Freeze File
  • Leasehold Assessment Calculation Worksheet
  • Model Home Exemption Files
  • Open Space Preferential Assessment File
  • Purchase Orders and Requisitions
  • Real Estate Transfer Declaration Monthly Count Reports
  • Real Estate Transfer Declarations (PTAX-203)
  • Returning Veterans' Homestead Exemption Files
  • Sale to Assessment Ratio Studies - IL Department of Revenue  
  • Sale to Assessment Ratio Studies - Internal
  • Senior Citizens Assessment Freeze Homestead Exemption Files
  • Senior Homestead Exemption Files
  • Tentative Abstract of Assessments (PTAX-204-S/A, '-280-A)
  • Township Assessor Annual Meeting Material

Hyperlinked documents may be obtained directly on the County Website. Please note that the FOIA and/or the Illinois Property Tax Code may specifically restrict the public dissemination of part or all these records.

Department Function, Headcount, and Budget Disclosure

The following information about the Supervisor of Assessments is provided pursuant to the requirements of 5 ILCS 140/1, et seq.:

  • Department Function: Created by state law to provide statistical assessment performance data to the Illinois Department of Revenue, the Supervisor of Assessments Office also gives technical advice and provides statistical analysis of assessment data to the township assessors and the DuPage County Board of Review. These statistics are the result of analyzing the data we gather from processing approximately 16,000 Real Estate Transfer Declarations on an annual basis. The Supervisor of Assessments Office also maintains records of total exempt properties and administers special assessment types such as the Senior Homestead Exemption, the Senior Assessment Freeze, the Veterans Exemption, the Veterans/Fraternal Organization Assessment Freeze, the Open Space Preferential Assessment Type, and the Model Home Exemption. In addition, the Supervisor of Assessments acts as an equalization authority, a statutory clerk of the Board of Review, and correlates the work of the nine township assessors. The Supervisor of Assessments is responsible for publishing assessment change notices and mailing notices to taxpayers.
  • Operating Budget: The Supervisor of Assessments' operating budget for fiscal year 2014 is $1,099,402. Offices: The Supervisor of Assessments has one office, which is located in the DuPage County Government Center complex, 421 N. County Farm Road, Wheaton, Illinois, 60187.
  • Employees: The Supervisor of Assessments office consists of sixteen (16) full-time employees.

Information to Consider Prior to Submitting Your Request

The information you are seeking may likely already be accessible on this website, or by contacting the department directly, and may not require you to submit a Freedom of Information Act (FOIA) request. You can learn more about each department by going to the FOIA Request Instructions and Forms page.

If the property for which the records are sought is located in a municipality, please contact the municipality (village, city, town) directly to obtain the records.